中国地质调查2015，Vol.2Issue(4)：56-60,61,6.
西藏1∶5万改则县北亭贡南部地区地质矿产调查主要成果
Main Achievements in Regional Geological and Mineral Prospective Survey of 1∶50 000 in Southern Beitinggong of Gaize County,Tibet
摘要
Abstract
The regional geological and mineral prospective survey project of 1∶50 000 in southern Beitinggong of Gaize County,Tibet has achieved main achievements as follows:①A new stratigraphic unit,the Upper Triassic Galanong Formation,was identified,and the Upper Jurassic Karinuo Formation was redefined according to evi-dences of paleontological fossils.② The U-Pb age of zircons from the diorite was (120 ±0.7)Ma,and the age from Lower Cretaceous Meiriqiecuo Formation was (121.9 ±1.6)Ma,which suggested that the Early Cretaceous was the most important period of volcanic activities in the survey area,and the volcanic activities were quite close with the subduction of Bangongco-Nujiang ocean.关键词
改则县/嘎拉弄组/吐卡日组/美日切错组/闪长岩Key words
Gaize County/Galanong Formation/Tukari Formation/Meiriqiecuo Formation/diorite分类
天文与地球科学引用本文复制引用
马德胜,熊兴国,吴滔,李月森..西藏1∶5万改则县北亭贡南部地区地质矿产调查主要成果[J].中国地质调查,2015,2(4):56-60,61,6.基金项目
中国地质调查“西藏1∶5万改则县北亭贡南部地区4幅地质矿产调查（编号∶1212010818033）、西藏1∶5万塔惹增地区4幅区调（编号∶1212011086035）和西藏1∶5万九子拉地区4幅区调（编号1212011121230）”项目资助。 （）
